Changes
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* Questions for the speaker go in the conferencing tool's chat window. Side comments and snark go in the IRC channel.
* Speaker would be reminded of their time by audio tones: one each minute for the first three minutes, one every 30 seconds until 30 seconds left, then one every 10 seconds, ending with an appropriate gong-like sound.
* Recording talks and archiving them can be really helpful for those who aren't able to attend.